Naslov
Azimuthal Charged-Particle Correlations and Possible Local Strong Parity Violation.

Autori
Abelev B.I. ; ... Planinić, Mirko ; Poljak, Nikola ; ...

Izvornik
Physical Review Letters (0031-9007) 103 (2009), 25; 251601-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
charged hadrons; parity violation

Sažetak
Parity-odd domains, corresponding to non-trivial topological solutions of the QCD vacuum, might be created during relativistic heavy ion collisions. These domains are predicted to lead to charge separation of quarks along the system's orbital momentum axis. We investigate a three particle azimuthal correlator which is a \P even observable, but directly sensitive to the charge separation effect. We report measurements of charged hadrons near center-of-mass rapidity with this observable in Au+Au and Cu+Cu collisions at $\sqrt{; ; ; s_{; ; ; NN}; ; ; }; ; ; $=200 GeV using the STAR detector. A signal consistent with several expectations from the theory is detected. We discuss possible contributions from other effects that are not related to parity violation.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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